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HIU performance has a major impact on the overall performance of heat networks, both with respect to return temperatures and network sizing.
Up until now many heat networks have failed to achieve their intended efficiency targets, the new standard developed to assess UK heat network operating parameters is regarded as an important step towards improving the overall performance of British district heating schemes.
The standard is based on an initial regime that was developed as part of a UK government research project into heat network efficiency and under the auspices of a steering group of industry experts, including: Gareth Jones of Fairheat Ltd, Valeria Khnykina of SSE, Martin Crane of Carbon Alternatives, Neil Shapland of the National House-Building Council, Paul Canning of E.ON Energy, Phil Jones of CIBSE, Rufus Ford of the Department for Business, Energy & Industrial Strategy, Steve Harper of Galliard Homes and Dimitriy Mostovoy of ENGIE, the purpose of the standard is three-fold:
HIUs that are tested according to the test regime specified in the standard will not be ‘certified’. Rather, the intention is to provide test results that will enable performance evaluated within the UK context.
There are two main outputs from this test regime:
In addition, the test regime will evidence compliance with other performance and reliability metrics, such as speed of temperature stabilisation.
The first manufacturers have now tested against the new standard, the results of which are below
| Supplier | HIU Serial Number | Test Report | VWART Calculation | Comments |
|---|---|---|---|---|
 A727-20174-20194 |
UK Distributor: Frese |
| Supplier | HIU Serial Number | Test Report | VWART Calculation | Comments |
|---|---|---|---|---|
| L7020418 |
Model name: Manufacturer: Danfoss |
| Supplier | HIU Serial Number | Test Report | VWART Calculation | Comments |
|---|---|---|---|---|
| L7020418 |
Model name: Manufacturer: Danfoss |
| Supplier | HIU Serial Number | Test Report | VWART Calculation | Comments |
|---|---|---|---|---|
| 52060-05102015024 |
Model Name: DATA Manufacturer: HSF B.V. |
| Supplier | HIU Serial Number | Test Report | VWART Calculation | Comments |
|---|---|---|---|---|
| MTPE1B1317A11 |
Model name: MTP4R-1R-TL1/1B (ModuSat XR-ECO TP 55-10R) Manufacturer: Evinox Energy Ltd |
| Supplier | HIU Serial Number | Test Report | VWART Calculation | Comments |
|---|---|---|---|---|
| 738965/4069451 |
Model name: Heating substation F3-H2T2-GE7-E-NR-O-9-2,5-0,40-2x110-1x130 |
If you are a HIU manufacturer, supplier or heat network operator and would like to test a HIU, then please contact Mark Oakes by emailing mark.oakes@thebesa.com
The initial technical specification for the HIU standard was produced by FairHeat in partnership with Martin Crane of Carbon Alternatives, under contract to Guru Systems as part of the Heat Networks Demonstration SBRI research project funded by DECC (now BEIS).
As part of the DECC funding, FairHeat commissioned SP Technical Research Institute of Sweden (SP) to modify the “Swedish Test” test rig, utilised for F:103-7e certification, to meet the requirements of the UK test specification. As an output from each test SP produced a test report.
Test Results: Reports and VWART Calculations: DECC funding paid for five of the tests, with the sixth test (Thermal Integration), being paid by the manufacturer.
Further information, including the initial regime ‘Modified Swedish Test UK HIU Test Regime_V1.0’ and the test results for the different HIUs is available from Fairheat’s website.
As registered CIBSE Heat Networks Consultants, BESA Consult offers certified consultancy on district heating and cooling schemes which builds on the Building Engineering Services Association’s unique market position.
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